Finding the Fourth Proportional to 12,655.31, 17,463.56 and 7,621.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,655.31 : 17,463.56 = 7,621.16 : x
2. Step 2: Convert to fraction form
   12,655.31/17,463.56 = 7,621.16/x
3. Step 3: Cross multiply
   12,655.31x = 17,463.56 × 7,621.16
4. Step 4: Simplify right side
   12,655.31x = 133,092,459.51
5. Step 5: Solve for x
   x = 133,092,459.51/12,655.31
6. Step 6: Final answer
   x = 10,516.73